Question

Rozwiąż uklad równań :
{ x - 4 = -2x
{-1-2(x-2y) = -(x-2) * (2+x) - (3-x) * (x+3)

Answer 1

{ x - 4 = -2x
{-1-2(x-2y) = -(x-2) * (2+x) - (3-x) * (x+3)

{x+2x=4
{-1-2x+4y=-(2x+x²-4-2x)-(3x+9-x²-3x)

{3x=4
{-1-2x+4y=-2x-x²+4+2x-3x-9+x²+3x

{3x=4/:3
{-2x+2x-2x+3x-3x+4y=4-9+1

{x=4/3
{-2x+4y= -4

{x=4/3
{-2*4/3+4y=-4

{x=4/3
{-8/3+4y= -4

{x=4/3
{4y= -4+8/3

{x=4/3
{4y= -4+2 2/3

{x=4/3
{4y= -1 1/3/:4

{x=4/3
{y=-4/3 * 1/4

{x=4/3
{y= -1/3